Derivative Instruments - Schedule of Gains (Losses) Recognized on Derivative Instruments by Contract Type (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative [Line Items]
Net realized gain (loss) on derivatives	$ 0	$ 2,413	$ (5,359)	$ 1,526
Net change in unrealized gain (loss) on derivatives	(4,124)	(9,040)	(853)	(13,118)
Series I
Derivative [Line Items]
Net realized gain (loss) on derivatives	0	619	(952)	412
Net change in unrealized gain (loss) on derivatives	(334)	(2,260)	194	(3,280)
Series II
Derivative [Line Items]
Net realized gain (loss) on derivatives	0	1,794	(4,407)	1,114
Net change in unrealized gain (loss) on derivatives	(3,790)	(6,780)	(1,047)	(9,838)
Credit Risk \| Credit Default Swaps
Derivative [Line Items]
Average derivative notional amounts	14,550	44,550	29,550	32,883
Net realized gain (loss) on derivatives	0	0	0	0
Net change in unrealized gain (loss) on derivatives	(1)	214	(525)	245
Credit Risk \| Credit Default Swaps \| Series I
Derivative [Line Items]
Average derivative notional amounts	2,376	11,251	5,179	8,215
Net realized gain (loss) on derivatives	0	0	0	0
Net change in unrealized gain (loss) on derivatives	221	53	129	60
Credit Risk \| Credit Default Swaps \| Series II
Derivative [Line Items]
Average derivative notional amounts	12,174	33,299	24,371	24,668
Net realized gain (loss) on derivatives	0	0	0	0
Net change in unrealized gain (loss) on derivatives	(222)	161	(654)	185
Interest Rate Risk
Derivative [Line Items]
Average derivative notional amounts	0	1,329,750	203,750	1,397,916
Net realized gain (loss) on derivatives	0	0	(5,359)	(386)
Net change in unrealized gain (loss) on derivatives	(1)	(3,262)	4,021	(8,951)
Interest Rate Risk \| Series I
Derivative [Line Items]
Average derivative notional amounts	0	335,835	38,914	351,835
Net realized gain (loss) on derivatives	0	0	(952)	(91)
Net change in unrealized gain (loss) on derivatives	60	(803)	779	(2,228)
Interest Rate Risk \| Series II
Derivative [Line Items]
Average derivative notional amounts	0	993,915	164,836	1,046,081
Net realized gain (loss) on derivatives	0	0	(4,407)	(295)
Net change in unrealized gain (loss) on derivatives	(61)	(2,459)	3,242	(6,723)
Forward \| Currency Risk
Derivative [Line Items]
Average derivative notional amounts	248,812	74,042	235,751	48,181
Net realized gain (loss) on derivatives	0	0	0	(678)
Net change in unrealized gain (loss) on derivatives	1,340	(3,888)	4,952	(4,396)
Forward \| Currency Risk \| Series I
Derivative [Line Items]
Average derivative notional amounts	40,588	18,432	40,227	11,984
Net realized gain (loss) on derivatives	0	0	0	(162)
Net change in unrealized gain (loss) on derivatives	277	(968)	827	(1,091)
Forward \| Currency Risk \| Series II
Derivative [Line Items]
Average derivative notional amounts	208,224	55,610	195,524	36,197
Net realized gain (loss) on derivatives	0	0	0	(516)
Net change in unrealized gain (loss) on derivatives	1,063	(2,920)	4,125	(3,305)
Interest Rate Swaps \| Interest Rate Risk
Derivative [Line Items]
Average derivative notional amounts	600,000	40,000	25,833	109,167
Net realized gain (loss) on derivatives	0	2,413	0	2,590
Net change in unrealized gain (loss) on derivatives	(4,132)	(2,104)	(7,685)	(16)
Interest Rate Swaps \| Interest Rate Risk \| Series I
Derivative [Line Items]
Average derivative notional amounts	97,995	10,102	201	27,270
Net realized gain (loss) on derivatives	0	619	0	665
Net change in unrealized gain (loss) on derivatives	(680)	(542)	(1,281)	(21)
Interest Rate Swaps \| Interest Rate Risk \| Series II
Derivative [Line Items]
Average derivative notional amounts	502,005	29,898	25,632	81,897
Net realized gain (loss) on derivatives	0	1,794	0	1,925
Net change in unrealized gain (loss) on derivatives	(3,452)	$ (1,562)	(6,404)	$ 5
Swaptions \| Market Risk
Derivative [Line Items]
Average derivative notional amounts	600,000		600,000
Net realized gain (loss) on derivatives			0
Net change in unrealized gain (loss) on derivatives	(1,330)		(1,616)
Swaptions \| Market Risk \| Series I
Derivative [Line Items]
Average derivative notional amounts	97,995		100,373
Net realized gain (loss) on derivatives			0
Net change in unrealized gain (loss) on derivatives	(212)		(260)
Swaptions \| Market Risk \| Series II
Derivative [Line Items]
Average derivative notional amounts	502,005		499,627
Net realized gain (loss) on derivatives			0
Net change in unrealized gain (loss) on derivatives	$ (1,118)		$ (1,356)